1939485261 has 16 divisors (see below), whose sum is σ = 2977970688. Its totient is φ = 1099815600.

The previous prime is 1939485259. The next prime is 1939485269. The reversal of 1939485261 is 1625849391.

1939485261 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1939485261 - 2¹ = 1939485259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1939485261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939485269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349755 + ... + 355256.

It is an arithmetic number, because the mean of its divisors is an integer number (186123168).

Almost surely, 2^1939485261 is an apocalyptic number.

It is an amenable number.

1939485261 is a deficient number, since it is larger than the sum of its proper divisors (1038485427).

1939485261 is a wasteful number, since it uses less digits than its factorization.

1939485261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705152.

The product of its digits is 466560, while the sum is 48.

The square root of 1939485261 is about 44039.5874299476. The cubic root of 1939485261 is about 1247.0833890105.

The spelling of 1939485261 in words is "one billion, nine hundred thirty-nine million, four hundred eighty-five thousand, two hundred sixty-one".